运行 rails 新命令时遇到错误
Error encountered when running rails new command
我想在 Rails 开始学习 Ruby。我已经通过 RVM 安装了 ruby 2.7.0。 SQLite3 也默认安装在 ubuntu 20.04.3 LTS 中。我的 rails 版本是 7.0.2.2。当我 运行 命令时：
rails new blog
来自本指南：
https://guides.rubyonrails.org/getting_started.html
它抛出一个错误：
lou@lou-VirtualBox:~$ rails new blog
create
create README.md
create Rakefile
create .ruby-version
create config.ru
create .gitignore
create .gitattributes
create Gemfile
run git init from "."
Traceback (most recent call last):
27: from /home/lou/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `<main>'
26: from /home/lou/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `eval'
25: from /home/lou/.rvm/gems/ruby-2.7.0/bin/rails:23:in `<main>'
24: from /home/lou/.rvm/gems/ruby-2.7.0/bin/rails:23:in `load'
23: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/exe/rails:10:in `<top (required)>'
22: from /home/lou/.rvm/rubies/ruby-2.7.0/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
21: from /home/lou/.rvm/rubies/ruby-2.7.0/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
20: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/cli.rb:18:in `<top (required)>'
19: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/command.rb:48:in `invoke'
18: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/command/base.rb:87:in `perform'
17: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor.rb:392:in `dispatch'
16: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
15: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
14: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/commands/application/application_command.rb:26:in `perform'
13: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/base.rb:485:in `start'
12: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/group.rb:232:in `dispatch'
11: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `invoke_all'
10: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `map'
9: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `each'
8: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `block in invoke_all'
7: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
6: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
5: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:328:in `create_root_files'
4: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/app_base.rb:134:in `build'
3: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/app_base.rb:134:in `public_send'
2: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:76:in `version_control'
1: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:258:in `user_default_branch'
/home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:258:in ``': No such file or directory - git (Errno::ENOENT)
我找不到与我相关的问题，所以我希望有人能帮助我。
我解决了我的问题。看起来它还需要安装 git。
添加此答案以提供一些背景知识。
要解决此问题，请安装 git。
Rails 尝试 运行 git init from "." 初始化当前工作目录中的存储库。
Rails reads the git default branch, see this post on superuser.com about the default branch.
要在git > 2.28中配置init.defaultBranch参数，可以运行 git config --global init.defaultBranch main.
不确定为什么要这样做，但您可以使用以下控制台选项跳过此步骤：
-G, [--skip-git], [--no-skip-git]
-p, [--pretend], [--no-pretend]
请参阅 Rails code 和 运行 rails new --help 以了解更多信息。
我想在 Rails 开始学习 Ruby。我已经通过 RVM 安装了 ruby 2.7.0。 SQLite3 也默认安装在 ubuntu 20.04.3 LTS 中。我的 rails 版本是 7.0.2.2。当我 运行 命令时：
rails new blog
来自本指南： https://guides.rubyonrails.org/getting_started.html
它抛出一个错误：
lou@lou-VirtualBox:~$ rails new blog
create
create README.md
create Rakefile
create .ruby-version
create config.ru
create .gitignore
create .gitattributes
create Gemfile
run git init from "."
Traceback (most recent call last):
27: from /home/lou/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `<main>'
26: from /home/lou/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `eval'
25: from /home/lou/.rvm/gems/ruby-2.7.0/bin/rails:23:in `<main>'
24: from /home/lou/.rvm/gems/ruby-2.7.0/bin/rails:23:in `load'
23: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/exe/rails:10:in `<top (required)>'
22: from /home/lou/.rvm/rubies/ruby-2.7.0/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
21: from /home/lou/.rvm/rubies/ruby-2.7.0/lib/ruby/2.7.0/rubygems/core_ext/kernel_require.rb:72:in `require'
20: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/cli.rb:18:in `<top (required)>'
19: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/command.rb:48:in `invoke'
18: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/command/base.rb:87:in `perform'
17: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor.rb:392:in `dispatch'
16: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
15: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
14: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/commands/application/application_command.rb:26:in `perform'
13: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/base.rb:485:in `start'
12: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/group.rb:232:in `dispatch'
11: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `invoke_all'
10: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `map'
9: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `each'
8: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:134:in `block in invoke_all'
7: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/invocation.rb:127:in `invoke_command'
6: from /home/lou/.rvm/gems/ruby-2.7.0/gems/thor-1.2.1/lib/thor/command.rb:27:in `run'
5: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:328:in `create_root_files'
4: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/app_base.rb:134:in `build'
3: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/app_base.rb:134:in `public_send'
2: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:76:in `version_control'
1: from /home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:258:in `user_default_branch'
/home/lou/.rvm/gems/ruby-2.7.0/gems/railties-7.0.2.2/lib/rails/generators/rails/app/app_generator.rb:258:in ``': No such file or directory - git (Errno::ENOENT)
我找不到与我相关的问题，所以我希望有人能帮助我。
我解决了我的问题。看起来它还需要安装 git。
添加此答案以提供一些背景知识。
要解决此问题，请安装 git。
Rails 尝试 运行 git init from "." 初始化当前工作目录中的存储库。
Rails reads the git default branch, see this post on superuser.com about the default branch.
要在git > 2.28中配置init.defaultBranch参数，可以运行 git config --global init.defaultBranch main.
不确定为什么要这样做，但您可以使用以下控制台选项跳过此步骤：
-G, [--skip-git], [--no-skip-git]
-p, [--pretend], [--no-pretend]
请参阅 Rails code 和 运行 rails new --help 以了解更多信息。